title: Unicompartmental knee arthroplasty enables near normal gait at higher speeds, unlike total knee arthroplasty.
abstract: Top walking speed (TWS) was used to compare UKA with TKA. Two groups of 23 patients, well matched for age, gender, height and weight and radiological severity were recruited based on high functional scores, more than twelve months post UKA or TKA. These were compared with 14 preop patients and 14 normal controls. Their gait was measured at increasing speeds on a treadmill instrumented with force plates. Both arthroplasty groups were significantly faster than the preop OA group. TKA patients walked substantially faster than any previously reported series of knee arthroplasties. UKA patients walked 10% faster than TKA, although not as fast as the normal controls. Stride length was 5% greater and stance time 7% shorter following UKA - both much closer to normal than TKA. Unlike TKA, UKA enables a near normal gait one year after surgery.
authors.affiliation: MSk Lab, Imperial College, London, England.
authors.forename: Anatole V
authors.initials: AV
authors.lastname: Wiik
authors.forename: Victoria
authors.initials: V
authors.lastname: Manning
authors.forename: Robin K
authors.initials: RK
authors.lastname: Strachan
authors.forename: Andrew A
authors.initials: AA
authors.lastname: Amis
authors.forename: Justin Peter
authors.initials: JP
authors.lastname: Cobb
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D005684:Gait; D006801:Humans; D007719:Knee Joint / Q000601:surgery*; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery*; D016059:Range of Motion, Articular
keywords: gait; stride length; total knee arthroplasty; unicompartmental knee arthroplasty; walking speed